The ADM3222A/3232E series is an RS-232 transceiver solution intended for portable  or handheld applications such as notebook or palmtop computers. The ADM3222A/3232E series has a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation.This charge pump allows the ADM3222A/3232E series to deliver true RS-232 performance from a single power supply ranging from +3.3V to  +5.0V.The ADM3222A/3232E are 2-driver/2-receiver devices. This series is ideal for portable or handheld applications such as notebook or palmtop computers.The ESD tolerance of the ADM3222A/3232E devices are over ±15kV for both Human Body Model and  IEC1000-4-2 Air discharge test methods.The ADM3222A device has a low-power shutdown mode where the devices' driver outputs and charge pumps are disabled.During  shutdown, the supply current falls to less than 1µA.